Zebra DelGuard Type-Lx Mechanical Pencil Color:Black this case is both sturdy

this case is both sturdy and convenient

Each pen is equipped with a convenient pocket clip for easy carrying and storage

Each pen comes with a retractable mechanism

or any other field that requires precise measurements and accurate drawings

the staedtler geometry set supports clean

Zebra DelGuard Type-Lx Mechanical Pencil Color:Black this case is both sturdyThe DelGuard utilizes an ingenious two part system that makes it virtually impossible to break the lead. First, a spring in the barrel of the pencil lets the lead slide back into the pencil instead of breaking if too much vertical pressure is applied. Second, another spring in the tip dynamically extends the lead guard to protect the lead when too much sideways pressure is applied. It may sound complicated, but it really works! And without the